Dow 17,000 still likely in 2013: Siegel

After a rocky period that could last through next month, stocks will see better days, Jeremy Siegel of the Wharton School of Business said Friday.

"It's going to be choppy over the next five or six weeks," he said. "I mean, we know rates are going to move higher. Now, what we hoped was when rates moved higher, we're going to get a stronger economy, so we're going to get some earnings boosts. That's what we need."

On CNBC's "Fast Money," the professor of finance remained bullish on the stock market.

"I certainly wouldn't throw in the towel. I'm still projecting Dow 16 to 17,000 by year end," he said. "I think we could have a very good fourth quarter. But we're going to have a challenge over the next five to six weeks."

Midday, the Dow Jones Industrial Average was on track to log its worst weekly drop since April – and the first back-to-back weekly loss since June.

"What happened yesterday was the worst possible world," Siegel said. "We had a strong labor market report with jobless claims, and we know the Fed looks at jobs for the tapering. And of course we have the weak guidance from the retailers."

— CNBC's Stephanie Landsman contributed research to this report. Follow her on Twitter: @StephLandsman.

Trader disclosure: On Aug. 15, 2013, the following stocks and commodities mentioned or intended to be mentioned on CNBC's "Fast Money" were owned by the "Fast Money" traders: Josh Brown is long TLT; Josh Brown is long AAPL; Josh Brown is long XLU; Josh Brown is long XLF; Josh Brown is long FSLR; Enis Tanner is long GS; Enis Tanner is long NUE; Enis Tanner is long CF call fly; Enis Tanner is long SPY Puts; Enis Tanner is long DXJ; Enis Tanner is long UUP; As of /15 Michael Murphy is long BAC; Michael Murphy is long C; Michael Murphy is long MSFT; Michael Murphy is long LEN; Michael Murphy is long TOL; Michael Murphy is long F; Michael Murphy is long INTC; Michael Murphy is long CAT.